Bump FxR version to 7 (#2217)

Author: bluemarvin

app/build.gradle

@@ -49,7 +49,7 @@ android {
         minSdkVersion build_versions.min_sdk
         targetSdkVersion build_versions.target_sdk
         versionCode 1
-        versionName "6"
+        versionName "7"
         buildConfigField "String", "GIT_HASH", "\"${getGitHash()}\""
         buildConfigField "Boolean", "DISABLE_CRASH_RESTART", getCrashRestartDisabled()
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"